Lexicon PCM 80 - MIDI IMPLEMENTATION DETAILS Midi Implementation Manual page 54

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Range Decode 16
Mid Rt. The value to display translation for Range Decode 16 Mid Rt (and for Range Decode 29 Spread)
is not straightforward because it is dependent on the values of the RvbDesign Link and RvbDesign Size
parameters.
First, Mid Rt always has a range of 0-63. The value is used as a lookup to the following table of millisecond
assignments:
242, 291, 329, 363, 395, 425, 454, 483, 512, 541, 570, 600, 629, 660, 691, 723, 755, 789, 824, 860, 897, 935, 975,
1017, 1061, 1106, 1154, 1203, 1256, 1311, 1369, 1430, 1495, 1564, 1637, 1715, 1799, 1888, 1984, 2088, 2200,
2321, 2453, 2598, 2757, 2932, 3126, 3344, 3588, 3864, 4179, 4543, 4967, 5468, 6069, 6802, 7719, 8897, 10468,
12666, 15963, 21456, 32441, 65393
If the value of the RvbDesign Link parameter is Off, then the displayed Mid Rt is that millisecond value
rounded up by 50 milliseconds. For example: 3588 will display as 3.63 seconds. If the RvbDesign Link
parameter is On, then the Mid Rt value is scaled by the following integer math formula:
(((RvbDesign Size value + 16)/16) * Mid Rt milliseconds)/10
Example: With the Plate reverb loaded (from Plate, Chorus+Rvb, Res1>Plate, or Res2>Plate) and
RvbDesign Link is assigned to On. RvbDesign Size parameter has a value of 0 (which is 4.0 meters) and
RvbTime Mid Rt is has a value of 63 which looks up as 65393 milliseconds. Scaled Mid Rt = (((0 + 16)/
16) * 65393)/10 = 6539 milliseconds. Displayed Mid Rt = 6.58 seconds.
A few more brief examples:
Plate RvbDesign Size value 90 (49.0 meters)
RvbTime Mid Rt value 43 (2598 msecs)
(((90 + 16)/16) * 2598)/10 = 1558 msecs
Display 1.60 seconds
Concert Hall RvbDesign Size value 269 (138.5 meters)
RvbTime Mid Rt value 62 (32441 msecs)
(((269 + 16)/16) * 32441)/10 = 55149 msecs
Display 55.1 seconds
Range Decode 17
The value is used as a lookup to the following valid filter crossover assignments.
30, 60, 90, 120, 151, 181, 212, 243, 273, 336, 398, 461, 525, 589, 654, 818, 986, 1158, 1333, 1513, 1697, 1886, 2079,
2278, 2481, 2691, 2906, 3127, 3355, 3591, 3833, 4084, 4343, 461, 4888, 5177, 5476, 5788, 6113, 6453, 6808, 7181,
7573, 7986, 8423, 8886, 9379, 9906, 10472, 11084, 11748, 12476, 13281, 14181, 15201, 16379, 17772, 19476,
21674, 24772, Off
Range Decode 18
The value is used as a lookup to the following valid filter crossover assignments.
525, 589, 654, 818, 986, 1158, 1333, 1513, 1697, 1886, 2079, 2278, 2481, 2691, 2906, 3127, 3355, 3591, 3833, 4084,
4343, 4611, 4888, 5177, 5476, 5788, 6113, 6453, 6808, 7181, 7573, 7986, 8423, 8886, 9379, 9906, 10472, 11084,
11748, 12476, 13281, 14181, 15201, 16379, 17772, 19476, 21674, 24772, Off
Range Decode 19
Rvb Time Inverse algorithm slopes. The parameter is always range 32 and the values 0-32 translate to
the display -64% through 0% to +64% in increments of 4%.
Range Decode 20
Off/On. The values 0 and 1 are displayed as "Off" and "On" respectively.
Range Decode 21
The value represents time in increments of 2 milliseconds.
(Round up by 50 ms as before).
PCM 80 MIDI Implementation Details
51